Resilient driving connection.



G. H. F. HOLY. :VRESILIE-NT nmvme connzcnou. APPLICATION FILEDNOV-6.1915.

Patented Sept. 24, 1918..

INVENTOR Georg? H F Holy.

GQNWNNY WITNESSES ATTORNEY UNITED STATES PATENT orrron.

ononen H. r. HOLY, or PITTSBURGH, PENNSYLVANIA, ASSIGNOB 'roWESTINGHOUSE mnc'rnic AND MANUFACTURING cemrANY, A conronA'rIoN orPENNSYLVANIA.

RESILIENT DRIVING CONNECTION.

' Specification of Letters Patent. Patented, Sept. 24, 1918.

Application filed November 6, 1915. Serial No. 80,080.

To all whomit may concern:

Be it known that I, GEORGE H. F. H0191, a citizen of the United Statesand a resi' ent of Pittsburgh, in the county ofAllegheny and State ofPennsylvania, have invented a new and useful Improvement in ResilientDriving Connections, of which the followin is a specification. yinvention relates to means for resiliently and operatively connectingtwo members and it has special reference to such means as. areinterposed between the driving wheels of railway vehicles and therotatable members of the propelling units.

The object of my invention is to provide a structure of the abovespecified character that shall be relatively compact, simple toconstruct, and easy to assemble and that shall be reliable in operation.

Heretofore, structures of the class under consideration have not alwaysbeen readily applicable to vehicles because of the limited availablespace for, assembling such connec tions. My invention provides aconnectionthat is relatively compact and may be easily assembled wherebut little working space is available, as hereinafter more fully setforth.

Figure 1 of the accompanying drawing is a sectional view of aresilientconnection embodying my invention as applied to a shaft of a railwayvehicle-propelling motor, the section being taken along the line II of'Fig. 2; Fig. 2 is a view, partially in side elevation and partially insection on line II-II of Fig. 1, with parts broken away; and Fig. 3 is aview, in side elevation, of an electric locomotive truck having aresilient connect-ion embodying my invention.

Referring to, Fig. 1 and Fig. 2 ofthe drawing, the resilient, connection1, as here shown, comprises a shaft 2 that isrigidly connected to thedriving member 3, a driven member 4: that is rotatively' mounted on theshaft2 and is resiliently connected to the driving member 3 by means ofa plurality of tangentially suitable pinion 6 member l.

Referring especially to Fig. 2 of the drawing, the driving member 3 andthe driven member 4 are-respectively provided with a plurality ofprojecting arms 7 and 8. The above-mentioned arms are severally that issecured to the driven disposed springs 5, and a' provided with apluralitv of retaining rings 9 and 10 that are integral therewith andthat serve as retaining means for the respective ends of the springs 5.:The rings 9 and 10 are internally screw-threaded to receive convolutionsof the springs The internal diameter of the rings '9 is slightly smallerthan that of the rings 10, for reasons to be hereinafter set forth.

Each spring 5 is interposed between a retaining ring 9, to which one endis secured by a suita'be plug 11, and a retaining ring 10 to which theother end is secured by a slmilar means.

Each spring 5 is of the same pitch throughout its length and has aslight but uniform taper toward one end. o

The cylindrical spring-retaining plug 11, the outer-surface of whichis-screw-threaded to engage convolutions of the spring 5, is

provided witha slot 12 into whichywedges 13 may be forced.

To assemble such a connection as Ihave herein described, the smaller endof oneiof the springs 5 is inserted into one of the retaming ringsordinary taper-threaded bolt would be, and

is screwed into place until the forward or,

smaller end of the spring en ages one of the retaining members 9 and t erearward or larger end thereof enga s the retaining member 10;It'willrea ily beyseen-that, after the sprin "has been positioned theends thereof wil fit tightly into place by reason of thebeforermentioned taper 'of the springs and the. difierences in. the,internal diameters of the retaining rings 9 and 10; The ends of thespring are rigidly-clamped intothe ing the plugs 11 and forcing thewedges 13 into place.

It will thus be noted that the. assembly of a construction such as Ihave described, may

be effected in a relatively easy and simple manner and that this isespecially true where the available workingspace is small.

A plurality of springs are, of. course, employed for each connection.but-inasmuch as the remaining springs are similarly and symmetricallyarranged with reference to the spring just described. I deem itunnecessary to describe the insertion of the remaining springs.

In Fig. 3 is shown a resilient connection,

10, in-the same manner as an retaining rings 9 and '10 by, insert I in alocomotive truck that comprises a plurality of propelling motors 2t) and'31 which are adapted to drive a plurality of wheels .23 and 24 by meansof a suitable jack-shaft 25 and a connecting rod 26.

lVhen power is applied to rotate the shaft 2 in either direction thedriving member will tend to" move independently of the driven member i,by reason of the compression of the springs 5. This independentmovement'of the driving member will continue until the springs have beensufliciently compressed to resist further relative movement, whereuponthe driven member will be rot'atively' actuated.= The compression of thesprings will thus tend to cushion any shocks or jolts'due to a suddenchange. in the angular velocity of the power transmission parts, as willbe understood.

.1 do not wish to be restricted to the specific structural details orlocation of parts herein set forth, as variousmodifications thereof maybe effected without departing from the spirit and scope of my invention.

I desire, therefore, that.- only'snch limitations shall be imposed asare indicated in the appended claims.

I claim as-n'iy invention:

1. A resilient connection comprising a driving member, a driven member,a-- plurality of helical springs for resiliently connecting saidmembers, and means whereby said springs may be screwed axially intooperative relation with said members.

2. A resilient" connection comprising a drivingmen'i'ber having an interal springretaining means, a driven member having an integralspring-retaining means, and a plurality of helical springs forresiliently connectmg said members, each of said'retaining means beinginternally screw-threaded to receive convolntions of said springs.

3f A *resilient connection comprising a driving member havingspring-retaining recesses," adriven member having similarspringwetttinin'g recesses," pluralitv *of helical springs forresiliently connecting:- said members, said recesses being of differ entdiameters and internally screw-threaded to receive eonvolutionsof saidsprings.

4. A resilient connection comprising a driving member havingspring-retaining reces'ses, a driven member having 1' ring-retainingrecesses. a plurality o helical springs for'resi'hently connecting saidmem-' bers, said're tainin g recesses being internally screw-threaded toreceive. end convolutlo'ns of said springs and 'ilugswitliin said endconvolutions and spring-retaining recesses. A resilient connectioncomprising a driving member having a plurality of spring-retainingrecesses, a driven member having correspomling recesses therein, and aplurality of frusto-conical helical springs for resiliently connectingsaid members, said recesses being of different diameters and internallyscrew-threaded to receive convolut-ions of said springs.

(5. A, resilient connection comprising a driving member havingspring-retaining recesses, a driven mel-nber having like recess s.

and a plurality' of-helical springs for resiliently connecting said11'ie1nbers,sai(l recesses being internally screw-tln'eaded to receiveeonvolutions of said springs and said recesses being of differentdiameters and adapted to closely fit said springs wherrin position.

7. A driving connection comprising a driving memberhaving'r-adialprojections, a. driven member having like projections, each of midprojections having a. spring-receiving recess, and a plurality oftangentiallyarranged frnstoctinical helical springs interposed betweensaid projections on said driving ancldriven' members, the ends ofsaid-springs being'secured in said recesses.

8. A driving connection comprising two relatively rotatablymountedmembers, and

a frusto-conical helical spring having one end rigidly secured to one ofsaid membersand having the other end rigidly secured to the other ofsaid members. i

9. A resilient connection comprising a driving member and a drivenmember, said driving member comprising a plurality of radially extendingarms each having a spring-receiving recess in the end thereof, saiddriving member being adapted to be secured-to a shaft, said drlve-nmember comprising a plurality of radially extending arms having likerecesses in the ends thereof, and a sleeve portion adapted to be ro-'tatably mounted-upon said shaft, a pinion secured to said sleeve,therecesses of one of said'mejnibers being larger than the recesses ofthe other of said members, and. a frustoconical spring for reil-ientlvconnecting said members, each end of said spring being respectivelysecured in one of said recesses.

In testimony "whereof, I have hereunto subscribed my name thisfltith dayof ()ct.,

GEORGE H. F. HOLY;

